Rabbi Abraham Ibn-Daud – Sefer Hakabbalah. Sefer ha-Qabbalah. ספר הקבלה לרב אברהם בן דוד (ראב”ד)
Rabbi Abraham Ibn-Daud (ben David) Halevi, known as Rabad (circa 1110-1180). A prominent scholar and translator, arguably he “…introduced Arabic numerals and the concept of the “zero” into European Mathematics.”  Some scholars believe he is the same person as the translator Avendauth, also known as “Avendeuth philosophus israelita”. 
Book First published in 1160.
On this website 18 Feb 2021.
The PDF of the book on this website was scanned by the University of Toronto, from the book Mediaeval Jewish chronicles and chronological notes, edited by Neubauer, Adolf, 1887. Publisher: Oxford, Clarendon Press. Gil Dekel carried OCR of the PDF and uploaded it on 18 Feb 2021. It is believed that the book is in public domain.
- Dimont, Max I. (1962). Jews, God, and History. New York: Simon and Schuster, p. 198:
“One of the earliest and most prominent of… Jewish intellectuals imported by the rulers of Western Europe, was Ibn Daud, who not only translated Hebrew, Greek, and Arabic literature into Latin, but also introduced Arabic numerals and the concept of the “zero” into European Mathematics.”
- Freudenthal, Gad. (2016) “Abraham Ibn Daud, Avendauth, Dominicus Gundissalinus and Practical Mathematics in Mid-Twelfth Century Toledo.” Aleph , Vol. 16, No. 1, pp. 61-106. Published by: Indiana University Press. https://www.jstor.org/stable/10.2979/aleph.16.1.61